PROBLEM TO BE SOLVED: To provide a biofunction evaluation technique capable of evaluating a biofunction while maintaining the evaluation accuracy while shortening the measurement time as compared with the prior art. A biological function evaluation device for evaluating a biological function of a measured person using a heartbeat interval, and a biological signal acquisition unit for acquiring a biological signal from the measured person, and detecting a body movement of the measured person. A body movement detecting unit, a heartbeat interval calculating unit that calculates a heartbeat interval from the biological signal, and the body movement detected by the body movement detecting unit based on the influence on the fluctuation of the heartbeat interval. An influence motion detection unit that detects a motion as an influence motion, and an influence that the heartbeat interval of the biological signal is affected by the body motion when the influence motion detection unit detects the body motion as the influence motion A section setting unit that specifies a section, and when the influencing motion detection unit detects the body movement as the influencing motion, a predetermined interval is set for the heartbeat interval in the influencing section identified by the interval setting unit. After performing the above processing, the biological function is evaluated. [Selection diagram] Figure 1【課題】従来よりも測定時間を短縮しつつ、評価精度を維持して生体機能を評価できる生体機能評価技術を提供することを目的とする。【解決手段】心拍間隔を用いて被測定者の生体機能の評価を行う生体機能評価装置は、前記被測定者から生体信号を取得する生体信号取得部と、前記被測定者の体動を検知する体動検知部と、前記生体信号から心拍間隔を算出する心拍間隔算出部と、前記体動検知部によって検知された前記体動が前記心拍間隔の変動に与えた影響に基づいて、前記体動を影響動作と検知する影響動作検知部と、前記影響動作検知部が前記体動を前記影響動作と検知した場合に、前記生体信号について前記心拍間隔が前記体動の影響を受けている影響区間を特定する区間設定部と、を有し、前記影響動作検知部が前記体動を前記影響動作と検知した場合に、前記区間設定部が特定した前記影響区間における前記心拍間隔に対して所定の処理を施した後に、前記生体機能の評価を行う。【選択図】図１
